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  • 1.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Tool Support for Enterprise Architecture Analysis: with application in cyber security2014Doktoravhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    In today’s companies, business processes and information technology areinterwoven. Old and new systems as well as off-the-shelf products and tailoredsolutions are used. This results in heterogeneous, often complex ITlandscapes. The impact of changes and the affected systems are difficult toidentify. However, volatile business environments and changing customer requestsrequire organizations to adapt quickly and to frequently make decisionsabout the modifications of their information technology.

    IT management aims at generating value from the usage of informationtechnology. One frequently used IT management approach is Enterprise Architecture.Company-wide models are used to obtain a holistic picture. Thesemodels are usually created using Enterprise Architecture modeling tools.These tools frequently have strong documentation capabilities. However, theyoften lack advanced analysis functionality. Specifically, such tools do not offersufficient support for the analysis of system properties, such as cyber security,availability or interoperability. The ability to analyze a set of possible scenariosand predict the properties of the modeled systems would be valuablefor decision-making. Changes or extensions could be evaluated before theirimplementation. In other domains, for example, in architecture in its classicalmeaning or in the development of machines, the analysis of models is a commonpractice. Typically, CAD tools are used to perform analysis and supportdecision-making. It is thereby possible to investigate the stability of buildingsor the performance of engines without the need for empirical testing.

    The contribution of the research work documented in this thesis is a softwaretool with a particular focus on the analysis of Enterprise Architecturemodels and thereby support for decision-making. This tool combines stateof-the-art Enterprise Architecture tooling with advanced analysis capabilitiesthat, until now, were only offered by modeling tools for other domains. Thepresented tool possesses two components. One component allows the creationof a metamodel capturing Enterprise Architecture analysis theory, for example,relevant concepts in the context of cyber security and how they relateto each other. The other component supports the instantiation of the metamodelinto an Enterprise Architecture model. Once a model is in place, itcan be analyzed with regards to the previously specified theory so that, forinstance, a cyber security evaluation can be conducted.

    The analysis tool was partly developed within the context of a larger researchproject on cyber security analysis. However, the tool is not restrictedto applications within this field. It can be used for the evaluation of numeroussystem properties. Several authors contributed to the tool both on an implementationlevel and in the development and design of the tool’s features. Theperformed research followed the Design Science methodology. First, the objectivesof a tool for Enterprise Architecture analysis were defined. Next, anartifact was designed and developed in terms of a software tool. This tool wasthen demonstrated and evaluated against the objectives. Lastly, the resultswere communicated to both academic and non-academic audiences.

  • 2.
    Buschle, Markus
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ekstedt, Mathias
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Grunow, S.
    Hauder, M.
    Matthes, F.
    Roth, S.
    Automating enterprise architecture documentation using an enterprise service bus2012Inngår i: 18th Americas Conference on Information Systems 2012, AMCIS 2012: Volume 6, 2012, 2012, s. 4213-4226Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Currently the documentation of Enterprise Architectures (EA) requires manual collection of data resulting in an error prone, expensive, and time consuming process. Recent approaches seek to automate and improve EA documentation by employing the productive system environment of organizations. In this paper, we investigate a specific Enterprise Service Bus (ESB) considered as the nervous system of an enterprise interconnecting business applications and processes as an information source. We evaluate the degree of coverage to which data of a productive system can be used for EA documentation. A vendor-specific ESB data model is reverse-engineered and transformation rules for three representative EA information models are derived. These transformation rules are employed to perform automated model transformations making the first step towards an automated EA documentation. We evaluate our approach using a productive ESB system from a leading enterprise of the fashion industry.

  • 3.
    Buschle, Markus
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Holm, Hannes
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Sommestad, Teodor
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ekstedt, Mathias
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Shahzad, Khurram
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    A tool for automatic enterprise architecture modeling2011Inngår i: Proceedings of the CAiSE Forum 2011, 2011, s. 25-32Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Enterprise architecture is an approach which aim to provide decision support based on organization-wide models. The creation of these models is however cumbersome as multiple aspects of an organization need to be considered. The Enterprise Architecture approach would be significantly less demanding if data used to create the models could be collected automatically. This paper illustrates how a vulnerability scanner can be utilized for data collection in order to automatically create enterprise architecture models. We show how this approach can be realized by extending an earlier presented Enterprise Architecture tool. An example is provided through a case study applying the tool on a real network.

  • 4.
    Buschle, Markus
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Holm, Hannes
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Sommestad, Teodor
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ekstedt, Mathias
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Shahzad, Khurram
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    A Tool for automatic Enterprise Architecture modeling2012Inngår i: IS Olympics: Information Systems in a Diverse World, Springer, 2012, s. 1-15Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Enterprise Architecture is an approach which aims to provide decision support based on organization-wide models. The creation of these models is however cumbersome as multiple aspects of an organization need to be considered. The Enterprise Architecture approach would be significantly less demanding if data used to create the models could be collected automatically. This paper illustrates how a vulnerability scanner can be utilized for data collection in order to automatically create Enterprise Architecture models, especially covering infrastructure aspects. We show how this approach can be realized by extending an earlier presented Enterprise Architecture tool. An example is provided through a case study applying the tool on a real network.

  • 5.
    Buschle, Markus
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Johnson, Pontus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Shahzad, Khurram
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    The Enterprise Architecture Analysis Tool–Support for the Predictive, Probabilistic Architecture Modeling Framework2013Inngår i: 19th Americas Conference on Information Systems, AMCIS 2013 - Hyperconnected World: Anything, Anywhere, Anytime, Association for Information Systems, 2013, s. 3350-3364Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The business of contemporary organizations is heavily dependent on information systems. Business processes and IT are interwoven and numerous technologies are in use. How the involved systems affect each other or impact the organizations' business domain is often uncertain, thus decision-making regarding information technology is challenging. Enterprise architecture (EA) is a holistic, model-based management approach. Many of the available EA software tools focus on documenting and have limited analysis capabilities. In this article, a tool for EA analysis is presented, supporting the analysis of properties such as business fit, security, and interoperability. The tool is implemented to support the Predictive, Probabilistic Architecture Modeling Framework to specify and apply assessment frameworks for performing property analysis on EA models.

  • 6.
    Buschle, Markus
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Quartel, Dick
    Novay.
    Extending the method of Bedell for Enterprise Architecture2011Inngår i: Proceedings of the Enterprise Distributed Object Computing Conference Workshops (EDOCW), 2011Konferansepaper (Fagfellevurdert)
    Abstract [en]

    If and where IT investments should be made can be determined with the help of IT portfolio valuation instruments. An interesting approach is Bedell?s method. However, this method originates from a time where enterprises were structured according to the classical silo architecture. Nowadays the importance of IT has increased, and IT systems and services are more and more interwoven with the business. Enterprise Architecture is a model-based approach that takes into consideration how companies are structured today and how they apply IT. In order to use Enterprise Architecture models in conjunction with Bedell?s method the method needs to be extended. This paper presents an updated version of Bedell?s method that exploits Enterprise Architecture models, in particular the information they contain about the alignment of IT support to the business. In addition, the paper illustrates the application of the method using an example.

  • 7.
    Buschle, Markus
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ullberg, Johan
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Franke, Ulrik
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Lagerström, Robert
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Sommestad, Teodor
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    A tool for enterprise architecture analysis using the PRM formalism2010Inngår i: CEUR Workshop Proceedings, 2010Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Enterprise architecture advocates model-based decision-making on enterprise-wide information system issues. In order to provide decisionmaking support, enterprise architecture models should not only be descriptive but also enable analysis. This paper presents a software tool, currently under development, for the evaluation of enterprise architecture models. In particular, the paper focuses on how to encode scientific theories so that they can be used for model-based analysis and reasoning under uncertainty. The tool architecture is described, and a case study shows how the tool supports the process of enterprise architecture analysis.

  • 8.
    Buschle, Markus
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ullberg, Johan
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Franke, Ulrik
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Lagerström, Robert
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Sommestad, Teodor
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    A Tool for Enterprise Architecture Analysis Using the PRM Formalism2011Inngår i: INFORMATION SYSTEMS EVOLUTION / [ed] Soffer P; Proper E, 2011, Vol. 72, s. 108-121Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Enterprise architecture advocates for model-based decision-making on enterprise-wide information system issues. In order to provide decision-making support, enterprise architecture models should not only be descriptive but also enable analysis. This paper presents a software tool, currently under development, for the evaluation of enterprise architecture models. In particular, the paper focuses on how to encode scientific theories so that they can be used for model-based analysis and reasoning under uncertainty. The tool architecture is described, and a case study shows how the tool supports the process of enterprise architecture analysis.

  • 9.
    Ekstedt, Mathias
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Franke, Ulrik
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Johnson, Pontus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Lagerstrom, Robert
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Sommestad, Teodor
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ullberg, Johan
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    A Tool for Enterprise Architecture Analysis of Maintainability: CSMR 2009, PROCEEDINGS2009Inngår i: EUR CON SFTWR MTNCE REENGR / [ed] Winter A, Knodel J, Los Almitos: IEEE COMPUTER SOC , 2009, s. 327-328Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A tool for Enterprise Architecture analysis using a probabilistic mathematical framework is demonstrated. The Model-View-Controller tool architecture is outlined, before the use of the tool is considered. A sample abstract maintainability model is created, showing the dependence of system maintainability on documentation quality. developer expertise, etc. Finally, a concrete model of an ERP system is discussed.

  • 10.
    Ericsson, Evelina
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Lillieskold, Joakim
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ekstedt, Mathias
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Developing a Design for Six Sigma Framework For the Analysis of Product Development Processes2015Inngår i: 2015 PORTLAND INTERNATIONAL CONFERENCE ON MANAGEMENT OF ENGINEERING AND TECHNOLOGY (PICMET'15), IEEE Communications Society, 2015, s. 1549-1561Konferansepaper (Fagfellevurdert)
    Abstract [en]

    During the last decades the importance of product development (PD) has become apparent for organizations. A majority of companies' total business results are dependent on the outcome of PD activities, results that crucially depends on new product's success and sales revenue. PD must be evaluated continuously, even without a physical final product accessible to measure. Therefore, in product development there is a need to evaluate the PD organization and project activities. This article presents a product development framework for analysis of organizations' product development performance according to Design for Six Sigma and evaluation of DFSS adopted companies' level of implementation.

  • 11.
    Franke, Ulrik
    et al.
    KTH, Skolan för elektro- och systemteknik (EES). SICS, Sweden.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES). Zeb Consulting, Sweden.
    Experimental Evidence on Decision-Making in Availability Service Level Agreements2016Inngår i: IEEE Transactions on Network and Service Management, ISSN 1932-4537, E-ISSN 1932-4537, Vol. 13, nr 1, s. 58-70Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    As more enterprises buy information technology services, studying their underpinning contracts becomes more important. With cloud computing and outsourcing, these service level agreements (SLAs) are now often the only link between the business and the supporting IT services. This paper presents an experimental economics investigation of decision-making with regard to availability SLAs, among enterprise IT professionals. The method and the ecologically valid subjects make the study unique to date among IT service SLA studies. The experiment consisted of pairwise choices under uncertainty, and subjects (N = 46) were incentivized by payments based on one of their choices, randomly selected. The research question investigated in this paper is: Do enterprise IT professionals maximize expected value when procuring availability SLAs, as would be optimal from the business point of view? The main result is that enterprise IT professionals fail to maximize expected value. Whereas some subjects do maximize expected value, others are risk-seeking, risk-averse, or exhibit non-monotonic preferences. The nonmonotonic behavior in particular is an interesting observation, which has no obvious explanation in the literature. For a subset of the subjects (N = 29), a few further hypotheses related to associations between general attitude to risk or professional experience on the one hand, and behavior in SLAs on the other hand, were investigated. No support for these associations was found. The results should be interpreted with caution, due to the limited number of subjects. However, given the prominence of SLAs in modern IT service management, the results are interesting and call for further research, as they indicate that current professional decision-making regarding SLAs can be improved. In particular, if general attitude to risk and professional experience do not impact decision-making with regard to SLAs, more extensive use of decision-support systems might be called for in order to facilitate proper risk management.

  • 12.
    Franke, Ulrik
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Holschke, O.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Närman, Per
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Rake-Revelant, J.
    IT consolidation - An optimization approach2010Inngår i: 2010 14th IEEE International Enterprise Distributed Object Computing Conference Workshops (EDOCW), IEEE , 2010, s. 21-26Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Consolidation of IT resources is a frequently cited task for IT decision makers, aiming to remove redundancy and thereby to cut costs. However, while economically motivated, the methods described in the literature rarely address costs directly. Instead, the focus often remains on purely IT-related considerations. In this paper, IT consolidation is addressed from an operations research perspective, applying a binary integer programming model to find optimal solutions to consolidation problems. Since accurate cost estimates are vital to successful consolidation, and play an important role in the presented binary integer program, the paper also addresses the costs involved in consolidation, with a particular focus on the costs of modifying business processes. Applying the mathematical method, with accurate cost estimates, enables decision makers to make optimal decisions in a transparent and rigorous way. The use of the proposed method is demonstrated with an example based on a real consolidation problem from a large European power supplier.

  • 13.
    Holm, Hannes
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Lagerström, Robert
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ekstedt, Mathias
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Automatic data collection for enterprise architecture models2014Inngår i: Software and Systems Modeling, ISSN 1619-1366, E-ISSN 1619-1374, Vol. 13, nr 2, s. 825-841Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Enterprise Architecture (EA) is an approach used to provide decision support based on organization-wide models. The creation of such models is, however, cumbersome as multiple aspects of an organization need to be considered, making manual efforts time-consuming, and error prone. Thus, the EA approach would be significantly more promising if the data used when creating the models could be collected automatically-a topic not yet properly addressed by either academia or industry. This paper proposes network scanning for automatic data collection and uses an existing software tool for generating EA models (ArchiMate is employed as an example) based on the IT infrastructure of enterprises. While some manual effort is required to make the models fully useful to many practical scenarios (e.g., to detail the actual services provided by IT components), empirical results show that the methodology is accurate and (in its default state) require little effort to carry out.

  • 14.
    Holm, Hannes
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Shahzad, Khurram
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ekstedt, Mathias
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    P2CySeMoL: Predictive, Probabilistic Cyber Security Modeling Language2015Inngår i: IEEE Transactions on Dependable and Secure Computing, ISSN 1545-5971, E-ISSN 1941-0018, Vol. 12, nr 6, s. 626-639Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper presents the Predictive, Probabilistic Cyber Security Modeling Language ((PCySeMoL)-Cy-2), an attack graph tool that can be used to estimate the cyber security of enterprise architectures. (PCySeMoL)-Cy-2 includes theory on how attacks and defenses relate quantitatively; thus, users must only model their assets and how these are connected in order to enable calculations. The performance of (PCySeMoL)-Cy-2 enables quick calculations of large object models. It has been validated on both a component level and a system level using literature, domain experts, surveys, observations, experiments and case studies.

  • 15.
    Johnson, Pontus
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ullberg, Johan
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Franke, Ulrik
    FOI - Swedish Defence Research Agency, Sweden.
    Shahzad, Khurram
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    An architecture modeling framework for probabilistic prediction2014Inngår i: Information Systems and E-Business Management, ISSN 1617-9846, E-ISSN 1617-9854, Vol. 12, nr 4, s. 595-622Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In the design phase of business and IT system development, it is desirable to predict the properties of the system-to-be. A number of formalisms to assess qualities such as performance, reliability and security have therefore previously been proposed. However, existing prediction systems do not allow the modeler to express uncertainty with respect to the design of the considered system. Yet, in contemporary business, the high rate of change in the environment leads to uncertainties about present and future characteristics of the system, so significant that ignoring them becomes problematic. In this paper, we propose a formalism, the Predictive, Probabilistic Architecture Modeling Framework (P(2)AMF), capable of advanced and probabilistically sound reasoning about business and IT architecture models, given in the form of Unified Modeling Language class and object diagrams. The proposed formalism is based on the Object Constraint Language (OCL). To OCL, P(2)AMF adds a probabilistic inference mechanism. The paper introduces P(2)AMF, describes its use for system property prediction and assessment and proposes an algorithm for probabilistic inference.

  • 16.
    Johnson, Pontus
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ullberg, Johan
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Franke, Ulrik
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Shahzad, Khurram
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    P2AMF: Predictive, probabilistic architecture modeling framework2013Inngår i: Lecture Notes in Business Information Processing, 2013, s. 104-117Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In the design phase of business and software system development, it is desirable to predict the properties of the system-to-be. Existing prediction systems do, however, not allow the modeler to express uncertainty with respect to the design of the considered system. In this paper, we propose a formalism, the Predictive, Probabilistic Architecture Modeling Framework (P 2AMF), capable of advanced and probabilistically sound reasoning about architecture models given in the form of UML class and object diagrams. The proposed formalism is based on the Object Constraint Language (OCL). To OCL, P2AMF adds a probabilistic inference mechanism. The paper introduces P2AMF, describes its use for system property prediction and assessment, and proposes an algorithm for probabilistic inference.

  • 17.
    Lagerström, Robert
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Sommestad, Teodor
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ekstedt, Mathias
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Enterprise architecture managements impact on information technology success2011Inngår i: Proceedings of the Hawaii International Conference on System Sciences (HICSS-44), IEEE , 2011, s. 1-10Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Both practitioners and researchers put forward enterprise architecture management as a mean for achieving success with information technology. Many arguments have been put forward to support the benefits claimed to arise from mature enterprise architecture management and a considerable amount of literature describes the components of mature (successful) enterprise architecture management. However, few studies have empirically tested whether the enterprise architecture management activities impact organizations' success with information technology. This paper tests the relationship between organizations' success with information technology and enterprise architecture management activities. Significant correlations are found between these variables.

  • 18.
    Närman, Per
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ekstedt, Mathias
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    An enterprise architecture framework for multi-attribute information systems analysis2014Inngår i: Journal of Software and Systems Modeling (online), ISSN 1619-1366, E-ISSN 1619-1374, Vol. 13, nr 3, s. 1085-1116Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Enterprise architecture is a model-based IT and business management discipline. Enterprise architecture analysis concerns using enterprise architecture models for analysis of selected properties to provide decision support. This paper presents a framework based on the ArchiMate metamodel for the assessment of four properties, viz., application usage, system availability, service response time and data accuracy. The framework integrates four existing metamodels into one and implements these in a tool for enterprise architecture analysis. The paper presents the overall metamodel and four viewpoints, one for each property. The underlying theory and formalization of the four viewpoints is presented. In addition to the tool implementation, a running example as well as guidelines for usage makes the viewpoints easily applicable.

  • 19.
    Närman, Per
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    König, Johan
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Johnson, Pontus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Hybrid Probabilistic Relational Models for System Quality Analysis2010Inngår i: Proceedings - IEEE International Enterprise Distributed Object Computing Workshop, EDOC, KTH Royal Institute of Technology, 2010, s. 57-66Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The formalism Probabilistic Relational Models (PRM) couples discrete Bayesian Networks with a modeling formalism similar to UML class diagrams and has been used for architecture analysis previously. PRMs are well-suited to perform architecture analysis with respect to system qualities since they support both modeling and analysis at the same time. A particular strength of PRMs is the ability to perform meaningful analysis of domains where there is a high level of uncertainty, as is often the case when performing system quality analysis. However, the use of discrete Bayesian networks in PRMs complicates the analysis of continuous phenomena. The main contribution of this paper is the Hybrid Probabilistic Relational Models (HPRM) formalism which extends PRMs to enable continuous analysis thus extending the applicability for architecture analysis and especially for trade-off analysis of system qualities. HPRMs use hybrid Bayesian networks which allow combinations of discrete and continuous variables. In addition to presenting the HPRM formalism, the paper contains an example which details the use of HPRMs for architecture trade-off analysis.

  • 20.
    Närman, Per
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Franke, Ulrik
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    König, Johan
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Ekstedt, Mathias
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Enterprise Architecture Availability Analysis Using Fault Trees and Stakeholder Interviews2014Inngår i: Enterprise Information Systems, ISSN 1751-7575, E-ISSN 1751-7583, Vol. 8, nr 1, s. 1-25Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The availability of enterprise information systems is a key concern for many organisations. This article describes a method for availability analysis based on Fault Tree Analysis and constructs from the ArchiMate enterprise architecture (EA) language. To test the quality of the method, several case-studies within the banking and electrical utility industries were performed. Input data were collected through stakeholder interviews. The results from the case studies were compared with availability of log data to determine the accuracy of the method's predictions. In the five cases where accurate log data were available, the yearly downtime estimates were within eight hours from the actual downtimes. The cost of performing the analysis was low; no case study required more than 20 man-hours of work, making the method ideal for practitioners with an interest in obtaining rapid availability estimates of their enterprise information systems.

  • 21.
    Pantazis, Konstantinos
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Österlind, Magnus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Johnson, Pontus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    The Enterprise Architecture Analysis Tool for Decision-Making: a case study2013Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    In this paper a tool for Enterprise Architecture Decision-making is proposed and its usage is described. Firstly, the Enterprise Architecture Analysis Tool (EAAT), which has been developed by the Industrial Information and Control Systems (ICS) department of KTH, is described. This tool has been used during a case study at a large Nordic company in order to create present and future state models for measuring service availability. These models, which are based on a metamodel, enable us to analyze service availability and identify bottlenecks of the company’s Enterprise Architecture. Subsequently the results of the case study are presented, showcasing that the changes proposed are beneficiary for company’s Enterprise Architecture. Finally it can be concluded that the case study validated that the tool is very helpful in decision making for Enterprise Architecture, but, nevertheless, some improvement suggestions are proposed.

  • 22.
    Ullberg, Johan
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Franke, Ulrik
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Johnson, Pontus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    A Tool for Interoperability Analysis of Enterprise Architecture Models using Pi-OCL2010Inngår i: Enterprise interoperability iv: making the internet of the future for the future of enterprise, 2010, s. 81-90Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Decision-making on enterprise-wide information system issues can be furthered by the use of models as advocated by the discipline of enterprise architecture. In order to provide decision-making support, enterprise architecture models should be amenable to analyses. This paper presents a software tool, currently under development, for interoperability analysis of enterprise architecture models. In particular, the ability to query models for structural information is the main focus of the paper. Both the tool architecture and its usage is described and exemplified.

  • 23.
    Ullberg, Johan
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Johnson, Pontus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    A language for interoperability modeling and prediction2012Inngår i: Computers in industry (Print), ISSN 0166-3615, E-ISSN 1872-6194, Vol. 63, nr 8, s. 766-774Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Interoperability, defined as the satisfaction of a communication need between two or more actors, is a sought after quality for enterprises in today's competitive environment. For a decision maker, understanding the effects of a changing market place and understanding how to adapt to the new environment is essential. Sustainable interoperability is an approach where such dynamic environments are considered, including how to adapt to the new environments. This paper presents a modeling language for describing architectures from an interoperability perspective and a formalism for inferring the degree of interoperability from the architecture models, thus supporting sustainable interoperability. The interoperability language is expressed as a Unified Modeling Language, UML, class diagram specifying classes, attributes, and relationships relevant for interoperability modeling. The class diagram is also augmented with a set of statements in the Object Constraint Language, OCL, supporting automated interoperability prediction.

  • 24.
    Ullberg, Johan
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Johnson, Pontus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    A Modeling Language for Interoperability Assessments2011Inngår i: ENTERPRISE INTEROPERABILITY / [ed] VanSinderen, M; Johnson, P, BERLIN: SPRINGER-VERLAG BERLIN , 2011, Vol. 76, s. 61-74Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Decision-making on issues related to interoperability can be furthered by the use of models of the organization or information system where interoperability is of concern. In order to provide decision-making support, the models should be amenable to analyses. This paper presents a modeling language specifically for interoperability issues where interoperability is defined as the probability that two more actors will be able to exchange information and use that information. The language is coupled with a probabilistic mechanism for automated interoperability assessments of the models created. The paper also presents an example of how the language can be applied.

  • 25.
    Ulrik, Franke
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem. FOI – Swedish Defence Research Agency SE-16490 Stockholm, Sweden.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Österlind, Magnus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    An experiment in SLA decision-making2013Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Decision-makingwithregardtoavailabilityservicelevelagree- ments (SLAs) is investigated. An experimental economics approach was used to elicit the preferences for different SLA alternatives from the sub- jects (N = 16), all professionally working with IT management. A pre- viously published scenario on downtime costs in the retail business was used in the experimental setup. Subjects made 18 pairwise choices under uncertainty. After the experiment, they were paid based on one of their choices, randomly selected. The subjects rarely behaved as expected util- ity maximizers in the experiment. This raises questions about company SLA management in real situations, and calls for further research.

  • 26.
    Välja, Margus
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Honeth, Nicolas
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Buschle, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Lagerström, Robert
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Sasi, Kottayil K.
    Somasundaran, Nithin
    An Archimate based analysis of Microgrid Control Systems Architectures2014Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The architectures containing embedded systems such as microgrid controllers are becoming more complex. While there are several known methodologies for embedded system modeling and design, they mostly cover development related performance issues. There exists a gap in the management of architectures implementing embedded systems for power systems applications. This paper proposes to use enterprise architecture analysis, based on earlier work, to fill that gap. Availability, interoperability and cost analysis are in focus. Enterprise architecture models are important in order to abstract the technical detail for planning and design in order to provide a basis for discussion of technical scalability and cost management amongst stakeholders and technical experts. A microgrid control architecture based example is given to illustrate the analysis possibilities.

1 - 26 of 26
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